Title:
FAULT DIAGNOSIS SYSTEM AND FAULT DIAGNOSIS METHOD FOR PHOTOVOLTAIC POWER GENERATION SYSTEM
Document Type and Number:
Japanese Patent JP2015068690
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a high-accuracy solar cell string degradation diagnosis method.SOLUTION: In a fault diagnosis system for a photovoltaic power generation system, a monitoring device calculates an estimated amount of solar radiation and an estimated operating temperature of a first solar cell string on the basis of a short-circuit current and an open-circuit voltage in a first solar cell string current-voltage characteristic and a measured array output voltage value and array output current value measured by an array measurement device. The monitoring device calculates an estimated current value of the first solar cell string by using the estimated amount of solar radiation, the estimated operating temperature, and the current-voltage characteristic. The monitoring device compares the estimated current value and the measured current value of the first solar cell string measured by a string current measurement device to diagnose the degradation of the first solar cell string.
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Inventors:
KONO TORU
OYA TETSUHARU
NAGAYAMA YUICHI
NAKAMURA TOMOHARU
MORIKAWA HIROKI
MIYAZAKI SATOSHI
OYA TETSUHARU
NAGAYAMA YUICHI
NAKAMURA TOMOHARU
MORIKAWA HIROKI
MIYAZAKI SATOSHI
Application Number:
JP2013201812A
Publication Date:
April 13, 2015
Filing Date:
September 27, 2013
Export Citation:
Assignee:
HITACHI LTD
TOKYO ELECTRIC POWER CO
TOKYO ELECTRIC POWER CO
International Classes:
G01R31/26; H01L31/04
Domestic Patent References:
| JP2012156343A | 2012-08-16 | |||
| JP2012160498A | 2012-08-23 | |||
| JP2013055132A | 2013-03-21 | |||
| JP2013084759A | 2013-05-09 | |||
| JP6075997B2 | 2017-02-08 | |||
| JP2014045073A | 2014-03-13 |
Foreign References:
| WO2015022728A1 | 2015-02-19 |
Other References:
TOHRU KOHNO, AKIHIRO NAKAMURA, TARO OSABE, KOKI MORIKAWA, TOMOHARU NAKAMURA: "“A Technique for Detecting Faults in a Photovoltaic Array”", PROCEEDINGS OF 27TH EUROPEAN PHOTOVOLTAIC SOLAR ENERGY CONFERENCE AND EXHIBITION, JPN7017000174, 24 September 2012 (2012-09-24), pages 3610 - 3615, ISSN: 0003484891
TOHRU KOHNO, MASAAKI FUJIMORI, TARO OSABE, HIROYUKI SHIMADA, KOKI MORIKAWA, SATOSHI MIYAZAKI, TOMOHA: "“Experimental Verification of Fault-diagnosis Architecture in a Large-scale Photovoltaic Power Plan", PROCEEDINGS OF 28TH EUROPEAN PHOTOVOLTAIC SOLAR ENERGY CONFERENCE AND EXHIBITION, JPN7017000175, 30 September 2013 (2013-09-30), pages 3709 - 3713, ISSN: 0003633027
河野 亨、大屋徹治、中村知治: "「メガソーラー向けＯ＆Ｍサービスと高精度ＰＶモジュール監視技術」", 日立評論, vol. 第９６巻第５号, JPN6017001667, 1 May 2014 (2014-05-01), pages 38 - 41, ISSN: 0003633028
TOHRU KOHNO, MASAAKI FUJIMORI, TARO OSABE, HIROYUKI SHIMADA, KOKI MORIKAWA, SATOSHI MIYAZAKI, TOMOHA: "“Experimental Verification of Fault-diagnosis Architecture in a Large-scale Photovoltaic Power Plan", PROCEEDINGS OF 28TH EUROPEAN PHOTOVOLTAIC SOLAR ENERGY CONFERENCE AND EXHIBITION, JPN7017000175, 30 September 2013 (2013-09-30), pages 3709 - 3713, ISSN: 0003633027
河野 亨、大屋徹治、中村知治: "「メガソーラー向けＯ＆Ｍサービスと高精度ＰＶモジュール監視技術」", 日立評論, vol. 第９６巻第５号, JPN6017001667, 1 May 2014 (2014-05-01), pages 38 - 41, ISSN: 0003633028
Attorney, Agent or Firm:
Fujio Patent Office